Improvement in street lamps, lanterns



J. 'BINNEY. Street Lamp.

Patented March 7, 1865.

UNITED STATES PATE T OFFICE.

JOHN BINNEY, on Bos'ron, MASSACHUSETTS.

IMPROVEMENT IN STREET LAMPS, LANTERNS, ac.

Specification forming part of Letters Patent No. 46,63 I, dated March 7,1865.

invention. Figs.2 and 3 are perspective views of parts of the samedetached; and Fig.4 a horizontal section through the chimney of thelamp, the annular shield or sleeve shown in Fig. 3 being removed.

Street lamps as usually constructed are surmounted by a conical,pyramidal, or other equivalently shaped covering, terminating at top ina chimney, provided with suitable apertures for the escape of theconsumed or vitiated air. These apertures were, however,so adapted as toadmit of currents of air entering the interior of the lamp, causingunsteadiness or flickering and occasional extinguishment of theilluminating-flame. To remedy this numerous devices were applied withbut little success owing to the deflection of the currents 'of air whenstriking the surfaces of protecting-shields with which the apertureswere mostly provided.

The object of this invention, therefore, is to so construct lampsexposed to winds or changeable currents of air that the winds orcurrents of air shall not affect the steadi ness of the flame, and thisI have accomplished by the construction of a street lamp or lantern inthe manner substautially as follows:

The lamp A, which may be cylindical, conical, or in the form of aninverted truncated pyramid, as those most generally in use, is.

surmountedby a cap or roof, B, of metal or glass, or of both metal andglass combined. In this instance it is composed of a truncated cone, B,provided at its lower end with a flange, (l, fitting an interior uprightflange, D, fast on the top or covering plate, E, of the glass case orlantern proper, A. To the upper end of the cone is secured the chimneyG- that is an upright tube having elongated vertical openings at. Thischimney is closed on top by a spherical cap, L. Over each opening a isfastened at its ends a metal band or strip,

b, in such manner as to allow egress fromwithin the lamp of the vitiatedor consumed air, while currents of air coming in an upward or downwarddirection from without the lamp and a point above or below the openingareexcluded.

To prevent currents of air coming horizontally, or'at an angle with thehorizontal plane,

but laterally in relation to the opening-z. 0., between the band orstrip b and the tube G from entering the interior of the lamp-case orlantern, I provide an additional shield, con-' sisting of an annularband, 0, of a diameter somewhat larger than the tube G, and so as toinclude the strips 1), andof such a height as to entirely inclose thetube overlapping its upper and lower edges. This annular band is heldconcentrically with the tube G by means of metal tongues d projectingfrom below and riveted to the cone B, as shown in the drawing.

The operation of this combination of devices will be understood bysupposing the currents of air striking in any of the directions aboveindicated. For instance, the wind coming along a horizontal plane fromeither side will be deflected by means of the annular shield c, whichentirely incloses the chimney, without, however, interfering with itsfunctions as a chimney-i. 0., the aiding the discharge of consumed air.0n the other hand, supposing the wind to strike the lamp at an anglewith the horizontal in such manneras to enter the-annular space betweenthe shield c and the tube G, then the current will be deflected by thebands I). In this way I have succeeded in combining and constructing alamp in which it is impossible to extinguish or even cause to flickerthe flame by currents of air of whatever intensity or direction.

Having thus fully described my invention and the manner in which thesame is or may be carried into effect, I claim- 1. The construction andarrangements of street lamps or lanterns or other lamps ex= posed toWindsor eurrents. of air, substan- In testimony whereof I have signed mytially as herein described. i name to this specification before two.sub- 2. A lantern or street lamp cap composed scribing witnesses.

of a chimney provided with apertures and JOHN BINNEY.

overhanging bands,'in combination with an W-tnesse annular shield, thewhole being constructed 1 p 7 fr operation in the manner and for thepur- A. POLLOK,

pose set forth. v VJAS. B. RoBB.

